[1] "quality" is not meant as an absolute value here, but relative to the publication's target - so a "quality" article on Gawker will of course (and rightfully so) be different from one you will find in the New Yorker
[2] as long as they make the same money from two options it is in the interest of the publication to choose the honest one, because they want you to come back
[3] these imperfections are unfortunately the only thing the advertising market lives on, because if everyone could figure out what they need they would buy exactly this from the best/cheapest retailer which would kill every incentive for any kind of advertising/referral money. This will also be a problem google will face some time in the future: if their search engine gets too perfect there is no need to advertise anymore, because if the user would actually want it they would find it anyways and if not the money is wasted